1977 Yamaha RD 125 DX 1977 nice unmolested example

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Price: 2,995.00 GBP

In 1973 the manufacturer introduced the designation RD (English for “Race Developed”) for its machines. The RD 125 was largely similar to the Yamaha AS3/AS2. The RD differed from its predecessors in that it had a teardrop tank to make the motorcycle slimmer in keeping with contemporary tastes. The wheelbase grew from 1200 mm to 1240 mm. The air filter was relocated under the side cover and the oil filler neck for the separate lubrication under the seat. The RD had a monotube steel frame ( diamond frame ) that was open at the bottom, with stereo shock absorbers at the rear and telescopic forks at the front. The air-cooled, counter-rotating two-stroke parallel twin with 125 cc displacement was square, meaning the stroke and bore were the same at 43 mm. The engine block was split horizontally. The Yamaha RD 125 had a reed valve control like the AS3 and twin Mikuni carburettors . Compared to the AS3, the power output was slightly increased to 12 kW (17 hp) at 9500 rpm. At 100 kW (136 hp), the power per liter of the small machine was high. The RD 125 was also 7 kg heavier than the AS3. It accelerated from 0 to 100 km/h in 13.5 seconds. The motorcycle was started with a Kickstarter . The RD 125 had duplex drum brakes at the front and simplex drum brakes at the rear . With the 1976 model year, the front brakes were changed to single disc brakes . ^{[[ 2 ] [[ 3 ]}

A significant change was the introduction of disc brakes for the entire model range. The models varied in equipment details such as paintwork. In 1982, with the DX 125/1E7, the wire-spoke wheels were replaced with cast wheels, in keeping with the fashion of the time.